A high-temperature resistant and high-density polymeric saturated brine-based drilling fluid

作     者：HUANG Xianbin SUN Jinsheng LYU Kaihe DONG Xiaodong LIU Fengbao GAO Chongyang HUANG Xianbin;SUN Jinsheng;LYU Kaihe;DONG Xiaodong;LIU Fengbao;GAO Chongyang

作者机构：MOE Key Laboratory of Unconventional Oil&Gas DevelopmentChina University of Petroleum(East China)Qingdao 266580China School of Petroleum EngineeringChina University of Petroleum(East China)Qingdao 266580China PetroChina Tarim Oilfield CompanyKorla 841000China 

出 版 物：《Petroleum Exploration and Development》 (石油勘探与开发（英文版）)

年 卷 期：2023年第50卷第5期

页      面：1215-1224页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070305[理学-高分子化学与物理] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：Supported by the National Natural Science Foundation of China(52288101) 

主　　题：deep drilling saturated brine-based drilling fluid high-temperature resistant additive water-based drilling fluid rheological property plugging performance lubricating performance 

摘      要：Three high-temperature resistant polymeric additives for water-based drilling fluids are designed and developed:weakly cross-linked zwitterionic polymer fluid loss reducer(WCZ),flexible polymer microsphere nano-plugging agent(FPM)and comb-structure polymeric lubricant(CSP).A high-temperature resistant and high-density polymeric saturated brine-based drilling fluid was developed for deep *** WCZ has a good anti-polyelectrolyte effect and exhibits the API fluid loss less than 8 mL after aging in saturated salt environment at 200°*** FPM can reduce the fluid loss by improving the quality of the mud cake and has a good plugging effect on nano-scale pores/*** CSP,with a weight average molecular weight of 4804,has multiple polar adsorption sites and exhibits excellent lubricating performance under high temperature and high salt *** developed drilling fluid system with a density of 2.0 g/cm^(3)has good rheological *** shows a fluid loss less than 15 mL at 200°C and high pressure,a sedimentation factor(SF)smaller than 0.52 after standing at high temperature for 5 d,and a rolling recovery of hydratable drill cuttings similar to oil-based drilling ***,it has good plugging and lubricating performance.